GSNOR deficiency promotes tumor growth via FAK1 S-nitrosylation

Salvatore Rizza, Luca Di Leo, Chiara Pecorari, Paola Giglio, Fiorella Faienza, Costanza Montagna, Emiliano Maiani, Michele Puglia, Francesca M Bosisio, Trine Skov Petersen, Lin Lin, Vendela Rissler, Juan Salamanca Viloria, Yonglun Luo, Elena Papaleo, Daniela De Zio, Blagoy Blagoev, Giuseppe Filomeni

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Abstract

Nitric oxide (NO) production in the tumor microenvironment is a common element in cancer. S-nitrosylation, the post-translational modification of cysteines by NO, is emerging as a key transduction mechanism sustaining tumorigenesis. However, most oncoproteins that are regulated by S-nitrosylation are still unknown. Here we show that S-nitrosoglutathione reductase (GSNOR), the enzyme that deactivates S-nitrosylation, is hypo-expressed in several human malignancies. Using multiple tumor models, we demonstrate that GSNOR deficiency induces S-nitrosylation of focal adhesion kinase 1 (FAK1) at C658. This event enhances FAK1 autophosphorylation and sustains tumorigenicity by providing cancer cells with the ability to survive in suspension (evade anoikis). In line with these results, GSNOR-deficient tumor models are highly susceptible to treatment with FAK1 inhibitors. Altogether, our findings advance our understanding of the oncogenic role of S-nitrosylation, define GSNOR as a tumor suppressor, and point to GSNOR hypo-expression as a therapeutically exploitable vulnerability in cancer.

OriginalsprogEngelsk
Artikelnummer111997
TidsskriftCell Reports
Vol/bind42
Nummer1
ISSN2211-1247
DOI
StatusUdgivet - 31 jan. 2023

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